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The authors study the integrated WiFi/WiMAX networks where users are equipped with dual-radio interfaces that can connect to either a WiFi or a WiMAX network. Previous research on integrated heterogeneous networks (e.g., WiFi/cellular) usually considers one network as the main, and the other as the auxiliary. The performance of the integrated network is compared with the "main" network. The gain is apparently due to the additional resources from the auxiliary network. In this study, the authors are interested in integration gain that comes from the better utilization of the resource rather than the increase of the resource. The heterogeneity of the two networks is the fundamental reason for the integration gain. To quantify it, they design a generic framework that supports different performance objectives.
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